Leather splitting machine



Dec; 5', 1950 H. FEHLMANN 2,532,398

LEATHER SPLITTING MACHINE Filed Ju1y 6, 1948 m ezvbop Ji Fffjb PatentedDec. 5, 1950 UNITED STATES PTENT oerics LEATHER SKLITTING MACHINE HenriFehlmann, Courtelary, Switzerland Application July 6, 1948, Serial No.37,147 In Switzerland July 7, 1947 2 Claims. 1

This invention relates to a leather splitting machine comprising a bandcutter mounted on a driving pulley and a driven pulley.

An important feature of the invention resides in that the operative partof the cutting band bears against two blade guides hingedly connected toa swing lever pivoted on a first lever while the nonoperative part ofthe band bears against a guide hinged to a second lever, both said firstand second levers being secured on a common shaft and controlled by acommon adjusting member allowing the band cutter to be fed transverselyin proportion as it wears away.

The annexed drawings represent by way of example a form of constructionof the machine embodying the invention.

Referring to said drawings:

Fig. 1 is a partial front elevational view of the machine.

Fig. 2 is a partial top plan View thereof;

Fig. 3 is a side elevational view of the machine, and

Fig. 4 is a vertical section, on an enlarged scale, along line IVIV ofFig. 2.

In the form of construction shown in the drawing, the machine comprisesa base I on which are mounted a driving pulley 3 and a free or drivenpulley 4 carrying a band cutter 5. The pulley 4 is adjustable in adirection perpendicular to its shaft in order to make it possible totighten the band.

In front of the upper part of the band there is placed a feeding table Iintended to guide the leather or hide to be split between a lower feedroller 8 and an upper guide fence 9 positioned below and above thecutting edge of the band respectively.

The fence 9 is supported, at its end lugs I I, I2, by means of settingscrews 22 having a cylindrical smooth extension I 3 loosely passingthrough a corresponding perforation in each of the lugs I I, [2. Anabutment screw I4 is provided for transmitting th raising axial motionfrom screw 22 to the lug I I (Fig. 4). The lower feed roller isjournaled in two bearings as at 21. The parallelism between the fenceand the band cutter may be adjusted by means of two set screws 22.

The driving shaft of an electric motor 38 is arranged parallelly to theshafts of the pulleys 3 and 4. The casing of the speed reducer 3! ismade integral from cast iron with the flange of the motor. At its otherend, the motor shaft carries a pulley 32 which drives the pulley 3 bymeans of a belt 33,

Two grinding wheels 34 are mounted scissorslike in front of the cuttingedge of the lower part of the band; they are driven by means of belts 35by a second electric motor 36 whose shaft is arranged perpendicularly tothe shaft of the first one.

An adjusting screw 45 with right-and-left handed thread cooperates withtwo nuts, each of which directly controls a grinding Wheel carryingbracket thus permitting said grinding wheels to be brought neareraccording as they wear. The adjusting screw 45 itself can be lifted orlowered to adjust the height of the grinding wheels.

The back edge of the band cutter bears against two upper back guides 46and 41 arranged on both sides of the free space for the leather to besplit and against a lower back guide arranged in the medial plane of themachine. The upper back guides are hingedly mounted on a horizontalswing lever 48 fulcrumed by its center on a pin pivot 49 carried by onearm of a double armed lever 50 secured to a vertical shaft 5|. On anextension of this shaft 5| is secured a double armed lever 52 on one armof which the lower back guide 54 is hingedly mounted. An adjusting screw53 acts on a cross bar 55 secured to the second arms of the levers 5i)and 52 to permit the back guides to be pushed forward and the bandcutter to be pushed against the grinding wheels 34 according as the bandcutter wears. The back guides are provided on their side against whichbears the back edge of the cutter with a piece of very hard metal orsome other Wear resistant material.

The casing 2 of the machine is shown sloping backwards in order toensure sufficientdeclivity to the feed table 1, thus facilitatingintroduction and withdrawing of the hides and improving the workingposition of the operator.

As a modification the guide fence could be replaced by an upper feedroller, loosely mounted or driven by the lower roller.

The machine as described enables of splitting leather or hides into verythin sheets of uniform thickness and on account of its regular operationa high output is ensured.

What I claim is:

1. In a leather splitting machine comprising two grinding wheels and aband cutter mounted on a driving and a driven pulley, a first lever, aswing lever fulcrumed on said first lever, two back guides hingedlymounted on said swing lever intended to bear against the operative partof the band cutter, a second lever, a back guide hingedly mounted onsaid second lever intended to bear against the nonoperative part of saidband, a common shaft to which both said first and second levers aresecured, a common adjusting member for controlling said shaft, wherebythe band outter can be fed accordingly'as it wears against said grindingwheels.

2. Leather splitting machine as claimed in claim 1, in which a piece ofwear resistant material is secured to each cutter back guide, said piecebeing intended to be in contact with the cutter band.

HENRI FEHLMANN.

No references cited.

